First of all, before explaining what I'm trying to do, let me clarify that my intentions are not steal any information, as it's only for study purposes, not even for my own entertainment.
I'm trying to analyze / sniff all packets which are sent or received from any device connected to my router which is exposed to the Internet. I'm currently using Wireshark on Windows 10, yet after filtering the packets that are being logged, the only ones I can recognize are the ones that are sent/received from my device, not others (I have access to router connected devices IP and MAC addresses). I did some basic googling and I found out that if I enable monitor mode, it's possible to analyze other devices packets, which I still can't after enabling it.
So my question remains, is it really possible to sniff all packets from all devices connected to a router using a sniffing software like Wireshark? Because from my point-of-view that it's not possible since I'm a "device" and not the "device manager".